feat(webui/plugins): display plugins in WebUI

Summary

• feat(webui/plugins): display plagins in WebUI

Add services to each tier and list of installed plugins to cluster info

Closes #809 (closed)

• refactor(test): move PluginReflection to conftest.py

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• Close #809 (closed)
• Cherry-pick to: none
• Docs follow-up: not necessary

changed milestone to %24.6 - Plugins and Tiers

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requested review from @aensidhe

assigned to @vifley

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• 5ce0c111 - refactor(test): move PluginReflection to conftest.py
• c1ee9e7f - feat(webui/plugins): display plagins in WebUI

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requested changes

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• 4ed51ca1...9b4b2289 - 3 commits from branch master
• 9797a07c - refactor(test): move PluginReflection to conftest.py
• 8b47edc1 - feat(webui/plugins): display plagins in WebUI

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• 17169a18...4313e525 - 4 commits from branch master
• 4a558fd2 - refactor(test): move PluginReflection to conftest.py
• 94e28907 - feat(webui/plugins): display plagins in WebUI

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approved this merge request

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• 94e28907...a6dc7e99 - 2 commits from branch master
• ecee622f - refactor(test): move PluginReflection to conftest.py
• 54566147 - feat(webui/plugins): display plagins in WebUI

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changed title from feat(webui/plugins): display plagins in WebUI to feat(webui/plugins): display plogins in WebUI